On Mon, Feb 12, 2024 at 05:16:33PM +0100, Thomas Zimmermann wrote:

Backlight drivers implement struct backlight_ops.check_fb, which
uses struct fb_info in its interface. Replace the callback with one
the does not use fb_info.

In DRM, we have several drivers that implement backlight support. By
including <linux/backlight.h> these drivers depend on <linux/fb.h>.
At the same time, fbdev is deprecated for new drivers and likely to
be replaced on many systems.

This patchset is part of a larger effort to implement the backlight
code without depending on fbdev.

Patch 1 makes the backlight core match backlight and framebuffer
devices via struct fb_info.bl_dev. Patches 2 to 9 then go through
drivers and remove unnecessary implementations of check_fb. Finally,
patch 10 replaces the check_fb hook with controls_device, which
uses the framebuffer's Linux device instead of the framebuffer.

I won't reply individually but I also took a look at the patches for
the combo devices and it all looked good to me from a backlight
point of view.

However I don't want to drop Reviewed-by: on them since it risks those
bit being mistaken for an ack and merged ahead of the patch 1...


Daniel.